Fix DeprecationWarning: invalid escape sequence

ciphers/affine_cipher.py

@@ -1,7 +1,7 @@
 from __future__ import print_function
 import sys, random, cryptomath_module as cryptoMath
 
-SYMBOLS = """ !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~"""
+SYMBOLS = r""" !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~"""
 
 def main():
     message = input('Enter message: ')

ciphers/rsa_cipher.py

@@ -6,7 +6,7 @@
 
 def main():
     filename = 'encrypted_file.txt'
-    response = input('Encrypte\Decrypt [e\d]: ')
+    response = input(r'Encrypte\Decrypt [e\d]: ')
 
     if response.lower().startswith('e'):
         mode = 'encrypt'

data_structures/binary tree/AVLtree.py

@@ -65,7 +65,7 @@ def my_max(a,b):
 
 
 def leftrotation(node):
-    '''
+    r'''
             A                      B
            / \                    / \
           B   C                  Bl  A
@@ -101,7 +101,7 @@ def rightrotation(node):
     return ret
 
 def rlrotation(node):
-    '''
+    r'''
             A              A                    Br      
            / \            / \                  /  \
           B   C    RR    Br  C       LR       B    A

data_structures/binary tree/binary_search_tree.py

@@ -195,7 +195,7 @@ def InPreOrder(curr_node):
     return nodeList
 
 def testBinarySearchTree():
-    '''
+    r'''
     Example
                   8
                  / \
@@ -206,7 +206,7 @@ def testBinarySearchTree():
                 4   7 13 
     '''
 
-    '''
+    r'''
     Example After Deletion
                   7
                  / \